Vehicle Detection Sample Clauses

Vehicle Detection. One potential disadvantage of using the background subtraction technique for detecting vehicles is that because the background is not updated frequently, it does not account for rapid lighting changes in the scene (Xxxxxxxxx et al., 2003). Such effects are often caused by the entrance of a highly reflective vehicle, such as a large white truck, into the scene. Before vehicles can be detected, these environmental illumination effects must be accounted for. In this current study, correction for environmental illumination effects was accomplished by using an automatic gain control (AGC). The AGC is a rectangular area that was placed in a part of the scene where the background was always visible (i.e., no vehicles were passing over the area). Thus, any changes in pixel intensities could be assumed to be due to environmental effects, since no physical objects had traversed the area. The average intensity change over this area from the background image could be determined and applied to the entire image to improve accuracy and avoid false vehicle detections: where: Δint Aagc ∑(bginti, j − iminti, j ) Δint = Aagf Aagc is the average intensity difference over the AGC area is the area of the AGC in number of pixels bginti, j iminti, j represents pixel intensity in the background image on the interval [0,1] represents pixel intensity in the foreground (current) image on the interval [0,1]. Vehicle detection was then performed with virtual detectors drawn by the user over the program scene. Each virtual detector consisted of a registration line, a detection line, and a longitudinal line, as illustrated in Figure 5-2. Registration Detection Longitudinal
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Vehicle Detection. (1) Detection Zone Placement. The video detection system must provide flexible detection zone placement anywhere within the combined field of view of the image sensors. Preferred presence detector configurations are lines or boxes placed across lanes of traffic or lines placed in-line with lanes of traffic. A single detector must be able to replace 1 or more conventional detector loops. Detection zones must be able to be fully overlapped. In addition, detection zones must be capable of implementing logical functions including delay timing. These logical functions may be excluded if provisions are made to bring each detector separately into the controller and the controller can provide these functions.
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Vehicle Detection. (1) Detection Zone Placement. The radar detection system must provide flexible detection zone placement anywhere within the combined field of view of the radar sensors. Preferred presence detector configurations are lines or boxes placed across lanes of traffic or lines placed in-line with lanes of traffic. A single detector must be able to replace 1 or more conventional detector loops. Detection zones must be able to be fully overlapped. In addition, detection zones must be capable of implementing logical functions including delay timing. These logical functions may be excluded if provisions are made to bring each detector separately into the controller and the controller can provide these functions.
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Vehicle Detection. ▪ Professional will design the intersection to show upgraded Iteris Vantage Vector vehicle detection system. The design will consist of advance vehicle detection on existing traffic signal poles and mast arms. Professional will design the plans to use existing signal conduit and identify the path for cabling to the controller cabinet. o New ATC cabinet ▪ Professional will design the intersection to show installation of a new ATC controller cabinet, utilizing the existing traffic signal controller cabinet foundation. o APS push buttons ▪ Professional will design the intersection to show upgraded APS push buttons. The design will consist of installing APS push buttons in place of the existing push buttons. Professional will design the plans to use existing signal conduit and poles and identify the path for APS signal cabling to the controller cabinet. The design will include the APS message chart. • For budgetary purposes, it is assumed that for half of the push buttons, Professional will redesign ramp or sidewalk to meet clear floor space requirements and design new push button poles. • Design will be prepared at 1” = 40’ on 11” x 17” plan sheets using MicroStation V8i. The design is anticipated to include the following plan sheets:
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Vehicle Detection. Up to 144 detection zones shall be supported and each detection zone can be sized to suit the site and the desired vehicle detection region. Detection zones may be ANDed or ORed together to indicate vehicle presence on a single detector output channel. Detection zone outputs shall be configurable to allow the selection of presence, pulse, extend, and delay outputs. Up to six detection zones per camera view shall have the capability to count the number of vehicles detected.
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Vehicle Detection. (1) Video Detection Zone. The video detection system must provide flexible and reliable detection zone placement anywhere within the combined field of view of the image sensors. Preferred presence detector configurations are lines or boxes placed across lanes of traffic or lines placed in-line with lanes of traffic. In addition, detection zones must be capable of implementing logical functions including delay timing. These logical functions may be excluded if provisions are made to bring each detector separately into the controller and the controller can provide these functions. Place the detection zones by means of graphical interface using the video image of the roadway. The detection zones must be capable of being sized, shaped and overlapped to provide optimal road coverage and to retrieve the detector configuration that is currently running in the video detection processor unit. Once a detection configuration is created, the system must provide a graphic display of the new configuration on the field monitor. Detection accuracy must include the presence of any vehicle in the defined detection zone regardless of the lane that the vehicle is occupying.
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Vehicle Detection. Equipment All equipment free of defects and operational problems such as:
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Vehicle Detection. ▪ Professional will design the intersection to show upgraded Iteris Vantage Vector vehicle detection system. The design will consist of advance vehicle detection on existing traffic signal poles and mast arms. Professional will design the plans to use existing signal conduit and identify the path for cabling to the controller cabinet. o APS push buttons ▪ Professional will design the intersection to show upgraded APS push buttons. The design will consist of installing APS push buttons in place of the existing push buttons. Professional will design the plans to use existing signal conduit and poles and identify the path for APS signal cabling to the controller cabinet. The design will include the APS message chart. • For budgetary purposes, it is assumed that for half of the push buttons, Professional will redesign ramp or sidewalk to meet clear floor space requirements and design new push button poles. • Design will be prepared at 1” = 40’ on 11” x 17” plan sheets using MicroStation V8i. The design is anticipated to include the following plan sheets:
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Vehicle Detection 
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